<div class="container">

    <div class="row row-offcanvas row-offcanvas-right">

        <div class="col-xs-6 col-sm-3 sidebar-offcanvas" id="sidebar" role="navigation">
            <div class="list-group">
                <a href="<?php echo site_url('email_user')?>" class="list-group-item active">任务列表</a>
                <a href="<?php echo site_url('email_user')?>" class="list-group-item">发件账号</a>
                <a href="#" class="list-group-item">收件账号</a>
                <a href="#" class="list-group-item">内容编辑</a>
                <a href="#" class="list-group-item">发送设置</a>
                <a href="#" class="list-group-item">发送日记</a>
            </div>
        </div><!--/span-->

        <div class="col-xs-12 col-sm-9">
<!-- Nav tabs -->
<ul class="nav nav-tabs">
  <li><a href="#home" data-toggle="tab">Home</a></li>
  <li><a href="#profile" data-toggle="tab">Profile</a></li>
  <li><a href="#messages" data-toggle="tab">Messages</a></li>
  <li><a href="#settings" data-toggle="tab">Settings</a></li>
</ul>

<!-- Tab panes -->
<div class="tab-content">
  <div class="tab-pane active" id="home">.事实上..</div>
  <div class="tab-pane" id="profile">.44..</div>
  <div class="tab-pane" id="messages">55...</div>
  <div class="tab-pane" id="settings">..66.</div>
</div>
        </div><!--/span-->


    </div><!--/row-->

    <hr>

    <footer>
        <p>© Company 2013</p>
    </footer>

</div>